:root {
  --bg: #f7fbff;
  --primary: #0ea5e9;
  --text: #0f172a;
  --muted: #64748b;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', Oxygen, Ubuntu, Cantarell, 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  background: var(--bg);
  color: var(--text);
}
.container {
  width: min(100%, 960px);
  margin-inline: auto;
  padding: 16px;
}
.card {
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(2, 32, 71, 0.08);
  border: 1px solid rgba(14, 165, 233, 0.12);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  border: none;
  color: #fff;
  background: var(--primary);
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(14,165,233,.3);
}
.btn.secondary { background: #1e293b; }
.field {
  display: grid;
  gap: 6px;
}
.field label {
  font-size: 14px;
  color: var(--muted);
}
.input, .select, .textarea {
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(2, 32, 71, 0.12);
  outline: none;
}
.row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
@media (min-width: 640px) {
  .row-2 { grid-template-columns: 1fr 1fr; }
}